D4.2 IB Bio Continuity and change

What does stability in an ecosystem refer to?

• The size of an ecosystem

• The number of species in an ecosystem

• The speed at which an ecosystem changes

• The ability of the system to maintain its structure and function over time

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What is the difference between resistance and resilience in an ecosystem?

• Resistance and resilience are the same thing

• Resistance and resilience are not related to ecosystem stability

• Resistance is the ability to recover after a disturbance, while resilience is the ability to remain stable in the face of disturbances

• Resistance is the ability to remain stable in the face of disturbances, while resilience is the ability to recover after a disturbance

Tags

NGSS.MS-LS2-4

What is a major factor that controls the supply of energy to food webs?

• Amount of water in the ecosystem

• Temperature of the ecosystem

• Diversity of the producers

• Number of consumers

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What can disrupt the functioning and stability of ecosystems?

• Depletion of nutrients

• Increase in biodiversity

• high genetic diversity

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the critical threshold of a change that results in a significant and often irreversible change in an ecosystem called?

• Critical point

• Tipping point

• Stability point

• Breakpoint

What is the term for species that have a disproportionately large impact on the community and help maintain stability?

• Dominant species

• Primary species

• Keystone species

• Endangered species

What does sustainability refer to?

• Capacity of meeting the needs of the present generation without compromising the ability of future generations

• Capacity of exploiting resources without any limits

• Capacity of destroying ecosystems for human benefit

• Capacity of ignoring environmental issues

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

What is eutrophication?

• Process by which water bodies become acidic

• Process by which water bodies become polluted with chemicals

• Process by which water bodies become depleted of nutrients

• Process by which water bodies become enriched with excessive nutrients

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NGSS.MS-LS2-3

What happens when a pollutant enters an ecosystem?

• Pollutants disappear immediately

• Organisms can receive them through absorption, ingestion or contact

• Pollutants only affect plants

• Pollutants have no impact on the ecosystem

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NGSS.MS-LS1-5

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is biomagnification?

• Concentration of a pollutant increasing in successive levels of the food chain

• Decrease in pollutant concentration in the food chain

• Pollutants disappearing from the food chain

• Pollutants affecting only the top predators

Tags

NGSS.MS-ESS3-4